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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2016
Fair Value Disclosures [Abstract] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis | A summary of financial assets and liabilities that are measured at fair value on a recurring basis, as of March 31, 2016 and December 31, 2015 were as follows (in thousands):
| Quoted Prices in Active Markets |  | Significant Other Observable Inputs |  | Significant Unobservable Inputs |  |
| (Level 1) |  | (Level 2) |  | (Level 3) |  | Total
March 31, 2016 |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |
Investments available-for-sale: |  |  |  |  |  |  |
Marketable securities - deferred |  |  |  |  |  |  |
compensation plan | $ | — |  |  | $ | 45,896 |  |  | $ | — |  |  | $ | 45,896 |
Marketable securities - other | 2,891 |  |  | — |  |  | — |  |  | 2,891 |
Liabilities: |  |  |  |  |  |  |
Derivative financial instruments | — |  |  | 764 |  |  | — |  |  | 764 |
Marketable securities - deferred |  |  |  |  |  |  |
compensation plan | — |  |  | 41,515 |  |  | — |  |  | 41,515 |
December 31, 2015 |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |
Derivative financial instruments | $ | — |  |  | $ | 210 |  |  | $ | — |  |  | $ | 210 |
Investments available-for-sale: |  |  |  |  |  |  |
Marketable securities - deferred |  |  |  |  |  |  |
compensation plan | — |  |  | 45,254 |  |  | — |  |  | 45,254 |
Marketable securities - other | 2,387 |  |  | — |  |  | — |  |  | 2,387 |
Liabilities: |  |  |  |  |  |  |
Marketable securities - deferred |  |  |  |  |  |  |
compensation plan | — |  |  | 43,568 |  |  | — |  |  | 43,568 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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